A soft metal or nonmetal sleeve, designed to mate with a pin-rivet. it may include an external wrenching facility which breaks off at a perdetermined torque to form a head.
NSN 6610-00-526-9440
NSN 5935-01-647-5460
NSN 5975-00-529-3835
NSN 6220-00-186-2238
NSN 5910-00-230-8881
NSN 5925-01-593-8473
NSN 5915-01-146-8951
NSN 5965-01-443-3407
NSN 5999-01-470-4759
NSN 6685-01-581-5462
NSN 5965-01-513-9978
NSN 6620-01-128-4462